unicode: only export internal symbols for the selftests

The exported symbols in utf8-norm.c are not needed for normal
file system consumers, so move them to conditional _GPL exports
just for the selftest.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>

fs/unicode/utf8-norm.c

@@ -17,7 +17,6 @@ int utf8version_is_supported(const struct unicode_map *um, unsigned int version)
 	}
 	return 0;
 }
-EXPORT_SYMBOL(utf8version_is_supported);
 
 /*
  * UTF-8 valid ranges.
@@ -407,7 +406,6 @@ ssize_t utf8nlen(const struct unicode_map *um, enum utf8_normalization n,
 	}
 	return ret;
 }
-EXPORT_SYMBOL(utf8nlen);
 
 /*
  * Set up an utf8cursor for use by utf8byte().
@@ -442,7 +440,6 @@ int utf8ncursor(struct utf8cursor *u8c, const struct unicode_map *um,
 		return -1;
 	return 0;
 }
-EXPORT_SYMBOL(utf8ncursor);
 
 /*
  * Get one byte from the normalized form of the string described by u8c.
@@ -588,4 +585,10 @@ int utf8byte(struct utf8cursor *u8c)
 		}
 	}
 }
-EXPORT_SYMBOL(utf8byte);
+
+#ifdef CONFIG_UNICODE_NORMALIZATION_SELFTEST_MODULE
+EXPORT_SYMBOL_GPL(utf8version_is_supported);
+EXPORT_SYMBOL_GPL(utf8nlen);
+EXPORT_SYMBOL_GPL(utf8ncursor);
+EXPORT_SYMBOL_GPL(utf8byte);
+#endif